Assign action to UI button

I have this asset. It have number of acdtions like attacks, skills etc. I have 3 buttons. I need to assign to each button one attack. But I have no idea how to do it.

Attacks in this asset are in struct:

 public struct Action
     {
         public string    m_name;        //Action Animation Name
         public KeyCode    m_keyCode;    //Input Keycode
     };

But function that performs the attack itself is bounded to animator:

 // Check Action Input
     private void UpdateActionControl()
     {
         int actionValue = 0;
 
         for(int i = 0 ; i < m_actionList.Length ; i ++ )
         {
             if( Input.GetKey(m_actionList[i].m_keyCode) == true )
             {
                 actionValue = i + 1;
                 break;
             }
         }
 
         m_ani.SetInteger("Action", actionValue); //animator
     }